NOAO >   Observing Info >   Approved Programs >   2018A-0387

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Program Information for 2018A-0387


PI: Paulo Miles-Paez, University of Western Ontario, ppaez@uwo.ca
Address: Physics Department, 1151 Richmond Avenue, London, Ontario N6A 3K7 Canada

CoI: Stanimir Metchev, University of Western Ontario
CoI: Benjamin George, University of Western Ontario

Title: Identifying the ultra-cool dwarfs with equator-on view to search for rocky planets.

Abstract: We propose to monitor photometrically a sample of 17 M7-T9 dwarfs to measure their rotation periods by using the 1.3m SMARTS, the 0.9m WIYN, and the 3.5m WIYN telescopes. Our targets have radii in the range 0.8-1 R$_{rm Jup}$ and all have projected rotational velocities $>$30 km,s$^{-1}$, which constrain their maximum rotation periods to $<$4 h. The determination of their rotation periods will allow us to derive the inclinations of the dwarfs' rotation axes, and will so reveal the most suitable targets to search for transiting Earth-sized planets. In addition, the requested data will allow us to address other two problems related to very-low mass stars and brown dwarfs: $i)$ the likely relation between the inclination of the spin axis and the dwarf's colors, and $ii)$ the evolution of angular momentum in the substellar regime. These observations will complement data for other 36 ultra-cool dwarfs, for which we have already requested high-resolution infrared spectra at the Gemini and the IRTF telescopes, as part of our on-going efforts to identify and fully characterize the most promising ultra-cool dwarfs for transits searches.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  CT-1.3m/ANDI -- 50hrs
Run 2 (2018A):  KP-0.9m/HDI -- 4n on Feb 22 - Feb 25 2018


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NOAO >   Observing Info >   Approved Programs >   2018A-0387

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